src/Pure/System/command_line.ML
author wenzelm
Fri, 17 Apr 2015 22:15:35 +0200
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child 62470 9037ed690e19
permissions -rw-r--r--
tuned spelling;
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(*  Title:      Pure/System/command_line.ML
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    Author:     Makarius
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Support for Isabelle/ML command line tools.
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*)
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signature COMMAND_LINE =
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sig
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  val tool: (unit -> int) -> unit
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  val tool0: (unit -> unit) -> unit
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end;
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structure Command_Line: COMMAND_LINE =
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struct
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fun tool body =
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  uninterruptible (fn restore_attributes => fn () =>
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    let
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      val rc =
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        restore_attributes body () handle exn =>
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          Exn.capture_exit 2 (fn () => (Runtime.exn_error_message exn; raise exn)) ();
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    in if rc = 0 then () else exit rc end) ();
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fun tool0 body = tool (fn () => (body (); 0));
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end;
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